What are the characteristics of composite coatings?

       The emergence of composite powders has significantly expanded the application range of coatings and improved coating properties. It has the following unique properties.

    (1) According to the needs, different manufacturing methods can be used to prepare coatings with different comprehensive properties, especially the composite powder coatings made of metals or alloys and non-metallic ceramics, which are difficult to achieve by other methods. ,

    (2) Unification of the heterogeneity of a single particle and the homogeneity of the powder as a whole. The resulting surface coating has uniform comprehensive physicochemical properties. Therefore, in the process of storage, transportation and use, segregation tendency will not appear or be analyzed. Thus, the defect of uneven coating quality caused by this is avoided.

    (3) The core material is protected by the coating layer or coating powder, which can avoid or reduce the oxidative burning loss, carbon loss, volatilization and other phenomena of elements caused by the action of the high temperature flame during the thermal spraying process, so as to obtain high-quality products. performance coating.

    (4) Select the appropriate components to prepare the composite powder. During the spraying process, a chemical reaction can occur between the powder components to form an intermetallic compound with a higher melting point than that of each component of the powder, and release a large amount of heat, which can be obtained. dense coating.

    (5) Compared with spraying mixed powder, spraying composite powder not only has excellent coating performance, but also has much higher spraying rate and deposition efficiency, which can improve labor productivity and reduce production cost.